Accumulated Other Comprehensive Loss (Changes in the balances of each component of accumulated other comprehensive loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Nov. 30, 2013		Nov. 30, 2012		Nov. 30, 2011
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (27,958)
Other comprehensive loss before reclassifications	7,083		(4,765)		(5,646)
Amounts reclassified from accumulated other comprehensive loss	3,359	[1]	2,959	[1]	2,151	[1]
Other comprehensive income (loss)	10,442		(1,806)		(3,495)
Ending Balance	(17,516)		(27,958)
Accumulated Define Benefit Plans Adjustment Member
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(27,958)		(26,152)
Other comprehensive loss before reclassifications	7,083		(4,765)
Amounts reclassified from accumulated other comprehensive loss	3,359		2,959
Other comprehensive income (loss)	10,442		(1,806)
Ending Balance	$ (17,516)		$ (27,958)

[1] (a)The accumulated other comprehensive loss components are included in the computation of net periodic benefit costs as further discussed in Note 20. Postretirement Benefits.